US 11,757,205 B2
Low-cost compact circularly polarized patch antenna with slot excitation for GNSS applications
Anton Pavlovich Stepanenko, Moscow (RU); Andrey Vitalievich Astakhov, Moscow (RU); and Sergey Nikolaevich Yemelianov, Moscow (RU)
Assigned to Topcon Positioning Systems, Inc., Livermore, CA (US)
Appl. No. 17/594,135
Filed by Topcon Positioning Systems, Inc., Livermore, CA (US)
PCT Filed Mar. 25, 2021, PCT No. PCT/RU2021/000119
§ 371(c)(1), (2) Date Oct. 4, 2021,
PCT Pub. No. WO2022/203534, PCT Pub. Date Sep. 29, 2022.
Prior Publication US 2022/0344831 A1, Oct. 27, 2022
Int. Cl. H01Q 21/06 (2006.01); H01Q 13/10 (2006.01); H01Q 21/20 (2006.01); H01Q 9/04 (2006.01)
CPC H01Q 21/064 (2013.01) [H01Q 9/0428 (2013.01); H01Q 9/0435 (2013.01); H01Q 13/106 (2013.01); H01Q 21/20 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An antenna comprising:
a ground plane;
a composite radiation patch disposed on a printed circuit board and comprising a conducting plate and a plurality of conductive strips, the composite radiation patch comprising an outer region and an inner region separated by a circle of a given radius,
wherein the conducting plate comprises 1) a first set of arcuate slots disposed on the circle and 2) a second set of slots each contacting an external perimeter of the conducting plate at one end and a corresponding slot of the first set of arcuate slots at another end, and
wherein the plurality of conductive strips is disposed within the outer region of the composite radiation patch, one or more of the plurality of conductive strips galvanically contacting the conducting plate; and
an excitation circuit disposed on the printed circuit board for exciting a right hand circularly polarized wave, the excitation circuit comprising a plurality of microstrip lines and a feeding network to which the plurality of microstrip lines are connected.